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Table 1 Baseline characteristics of patients with and without post-induction hypotension

From: Machine learning-based prediction of post-induction hypotension: identifying risk factors and enhancing anesthesia management

Variables

PIH (N = 921)

non-PIH (N = 4485)

P

Patient Characteristics

 Age, mean (SD)

58.4 (15.5)

57.1 (14.4)

0.016

Sex

  

< 0.001

 Female

567 (61.6)

2157 (48.1)

 

 Male

354 (38.4)

2328 (51.9)

 

Heigh, cm

159.9 (10.4)

162.6 (9.1)

< 0.001

Weight, kg

58.5 (11.0)

62.2 (11.7)

< 0.001

BMI

22.8 (3.5)

23.5 (3.6)

< 0.001

ASA PS

  

0.07

 I

291 (31.6)

1284 (28.6)

 

 II

507 (55.0)

2647 (59.0)

 

 III

96 (10.4)

449 (10.0)

 

 IV ~ VI

10 (1.1)

23 (5.1)

 

Department

 

< 0.001

 General surgery

796

3487

 

 Gynecology

25

154

 

 Thoracic surgery

93

744

 

 Urology

7

100

 

EMOP

  

0.845

 Yes

101

482

 

 No

820

4003

 

HTN

  

0.013

 Yes

250

1403

 

 No

671

3082

 

DM

  

0.412

 Yes

88

469

 

 No

833

4016

 

Laboratory Tests

 Hemoglobin

12.6 (1.8)

12.9 (1.9)

< 0.001

 Platelet

240.0 (82.4)

244.6 (83.4)

0.134

 PT

99.7 (15.7)

101.0 (14.3)

0.024

 APTT

32.7 (4.9)

32.7 (7.4)

0.803

 Na

139.9 (3.0)

140.2 (2.8)

0.004

 K

4.2 (0.4)

4.2 (0.4)

0.511

 Glucose

115.3 (43.4)

115.3 (41.8)

0.998

 Albumin

4.0 (0.5)

4.1 (0.5)

< 0.001

 AST

28.5 (52.6)

29.9 (139.8)

0.771

 ALT

26.3 (56.7)

27.9 (85.4)

0.601

 BUN

15.9 (10.0)

15.6 (9.4)

0.317

 Creatinine

0.9 (1.0)

1.0 (1.4)

0.035

Baseline Blood Pressure

 SBP

136.5 (27.0)

147.7 (25.2)

< 0.001

 MBP

95.2 (17.0)

104.9 (16.7)

< 0.001

 DBP

71.9 (11.9)

79.8 (11.9)

< 0.001

Use of anesthetic drugs

 Propofol

328 (35.6)

1794 (40.0)

0.013

 Fentanyl

146 (15.9)

937 (20.9)

0.001

 Rocuronium

912 (99.0)

4402 (98.1)

0.062

  1. Abbreviations: PIH Post-Induction Hypotension, BMI Body mass index, ASA PS American Society of Anesthesiologists Physical Status, EMOP Emergency operation, HTN Hypertension, DM Diabetes, PT Prothrombin time, APTT Activated partial thromboplastin time, ALT Aminotransferase, AST glutamine aminotransferase, BUN Blood urea nitrogen, SBP Systolic blood pressure, MBP Mean arterial pressure, DBP Diastolic blood pressure